Will this be a good set up?

buford1488 PM buford1488 buford1488's Posts buford1488's Threads Sophomore Rider Currently Offline Posts: 217 Likes: 22 Joined: Mar 3, 2013 8:42:52 GMT -5	Will this be a good set up? by: buford1488 - Jun 2, 2013 16:31:29 GMT -5 Reply Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by buford1488 on Jun 2, 2013 16:31:29 GMT -5 right...more air needs more fuel..............
	Last Edit: Jun 2, 2013 16:32:40 GMT -5 by buford1488 performance machine shop. porting&polishing. porting for over 28yrs

ej132 PM ej132 ej132's Posts ej132's Threads Sophomore Rider Currently Offline Posts: 148 Likes: 0 Joined: Mar 16, 2013 16:19:44 GMT -5	Will this be a good set up? by: ej132 - Jun 2, 2013 16:56:25 GMT -5 Reply Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by ej132 on Jun 2, 2013 16:56:25 GMT -5 Ok, I'm thinking ill try a #92, also my current weights when I took them out weighed 5.6 grams, is 7grams a good starting point for this size engine now? Thinking it could be over revving.
	Peace Sports Ruckus Clone Scrappy's 50mm BBK Big valve A9 camshaft Orange cdi box 5.6 gram rollers

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Will this be a good set up? by: ej132 - Jun 3, 2013 15:39:30 GMT -5

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Post by ej132 on Jun 3, 2013 15:39:30 GMT -5

So I ordered a #92 main jet today so hopefully that will help. I've tried tuning the carb and the a/f mixture screw is pretty dang far out so that is set real rich which I believe also confirms I need a bigger jet. Also I've noticed that when letting off the throttle I'm getting a small backfire, it's not as loud as a normal one but I can definetly hear it, what causes backfires?

Peace Sports Ruckus Clone
Scrappy's 50mm BBK
Big valve
A9 camshaft
Orange cdi box
5.6 gram rollers

ej132 PM ej132 ej132's Posts ej132's Threads Sophomore Rider Currently Offline Posts: 148 Likes: 0 Joined: Mar 16, 2013 16:19:44 GMT -5	Will this be a good set up? by: ej132 - Jun 4, 2013 16:36:47 GMT -5 Reply Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by ej132 on Jun 4, 2013 16:36:47 GMT -5 Still trying to post up a picture of the spark plug, everytime I try it says web page not found, so not sure whats happening there. I am well below the max size. Still waiting for the #92 jet to come in.
	Peace Sports Ruckus Clone Scrappy's 50mm BBK Big valve A9 camshaft Orange cdi box 5.6 gram rollers

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Will this be a good set up? by: ej132 - Jun 11, 2013 1:08:12 GMT -5

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Post by ej132 on Jun 11, 2013 1:08:12 GMT -5

Ok so called up Scrappys today to find out where my a9 is. Said they were still doing inventory on the parts but was told they would make sure to get mine out the door today, hopefully that happened. Still waiting for my #92 jet to come in, hopefully that will be the correct size, little bit confused because seems to be running lean but getting some back firing, thinking its just cause the a/f screw is almost all the way out and it's just not right cause of the wrong jet.

Where is a good place to start for picking a roller size on this setup? 7 or 8 gram?

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A9 camshaft
Orange cdi box
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Will this be a good set up? by: lykos23 - Jun 11, 2013 10:25:19 GMT -5

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Post by lykos23 on Jun 11, 2013 10:25:19 GMT -5

[replyingto=ej132]ej132[/replyingto]9g sliders, equal to 8g rollers, was just a bit too heavy for me and my former setup. However, with a lighter performance variator 8g would be a great place to start. For the stock variator 5-7 should be good depending on other factors.

I'm sure you know this, but the a/f screw doesn't effect the main jet very much. It only effects up to 1/8 throttle or so. The A/F screw works with your idle jet for low speeds and idling. If your screw is all the way out then your idle jet may be too big?

Here's some info that Alleyoop gave me regarding popping sounds and rich/lean conditions.

Every motor is different and what works for one may not work for another. One will tell you this another will tell you that.But if you listen to the sounds it makes it will tell you what the motor needs.

Here are a few tricks of the trade this will help you get it right:

1. Popping while accelerating is a RICH condition.
2. Popping while de-celerating is a LEAN condition.
3. Burp Sounds accelerating is a LEAN condition
4. Backfires are a Lean condition.

Possible causes for above and fixes:
1. Here the problem is it is running OVERLEY rich and the main jet is to big.
2. Here couple things:
a. You can richen up the Fuel Ratio Mixture
b. Idling to low Bring up the idle a little
3. You can richen up the Fuel Ratio Mixture
4. Usually caused by it Leaking where the Pipe Connects to the motor. Bad air leaks cause the backfiring many think it is because it is to RICH but it is the OPPOSITE sucking in air causing very Lean condition and this can damage your exhaust valve.

Alleyoop

Hope this helps some.

Good luck!

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Will this be a good set up? by: ej132 - Jun 11, 2013 14:18:18 GMT -5

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Post by ej132 on Jun 11, 2013 14:18:18 GMT -5

Thanks for that info, I'm just a bit confused cause it seems like my #

jet seems to small, cause the engine is running very very hot and feels like I'm not getting enough fuel but the on de acceleration I'm getting this popping or back firing. I'm just a bit confused.

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Will this be a good set up? by: ej132 - Jun 15, 2013 22:55:59 GMT -5

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Post by ej132 on Jun 15, 2013 22:55:59 GMT -5

Ok so finally got my a9 cam today! Hopefully will get that installed in the next few days, still waiting for my #92 main jet. Maybe my cam is just a tooth off and thats my problems? But millsc you said with this head I would probably need a bigger jet than #

. Thinking of putting in a #38 idle jet, cause Im having to hit the throttle most of the time to get the electric starter to work.

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Scrappy's 50mm BBK
Big valve
A9 camshaft
Orange cdi box
5.6 gram rollers

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Will this be a good set up? by: alleyoop - Jun 15, 2013 23:26:38 GMT -5

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Post by alleyoop on Jun 15, 2013 23:26:38 GMT -5

Well make sure you know what it is POPPING or BACKFIREING. Popping is just that it sounds like POP, BACKFIRING is like a POW POW like a gun went off.

Popping in de-cel you could have the IDLE SET TO LOW or you can fix that with the Fuel Ratio Mixture by richen it up about 1/4-1/2 turn.

Backfireing on Dec you have a AIR LEAK usually by the FLANGE that is where the pipe connects to the motor.
TWO DIFFERENT sound two different remedies, also backfiring you can burn out your exhaust valve.

Also if your FUEL RATIO MIXTURE IS out over 3 turns you need the next HIGHER PILOT JET. The Pilot jet in there is to small.
Now all this has nothing to do with the MAIN JET.
Alleyoop

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